Answered: In a test of the effectiveness of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a test of the effectiveness of garlic for lowering cholesterol,

subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes

(before−after)

in their levels of LDL cholesterol (in mg/dL) have a mean of

4.1

and a standard deviation of

16.5.

Construct a

99%

confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol?

Click here to view a t distribution table.

In a test of the effectiveness of garlic for lowering cholesterol, 48 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before - after) in their levels of LDL
cholesterol (in mg/dL) have a mean of 4.1 and a standard deviation of 16.5. Construct a 99% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the
effectiveness of garlic in reducing LDL cholesterol?
Click here to view a t distribution table.
Click here to view page 1 of the standard normal distribution table.
Click here to view page 2 of the standard normal distribution table.
What is the confidence interval estimate of the population mean u?
mg/dL <µ< mg/dL
(Round to two decimal places as needed.)
What does the confidence interval suggest about the effectiveness of the treatment?
O A. The confidence interval limits contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels.
O B. The confidence interval limits contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels.
OC. The confidence interval limits do not contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels.
O D. The confidence interval limits do not contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels.

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